SIEMENS 3RV2021-1BA15

<h2>Siemens SIRIUS Motor Protection Circuit Breaker 1.4-2.0A</h2> <h3>Description</h3> <p>The Siemens 3RV2021-1BA15 is a high-quality motor protection circuit breaker from the renowned SIRIUS series. This size S0 breaker is designed to reliably protect motors from damage caused by overload and short circuits. It features a rotary switch for easy operation and clear status indication. This unit is new old stock, in excellent condition, and ready for deployment in your industrial applications.</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Siemens</li> <li>Product Line: SIRIUS</li> <li>Model Number: 3RV2021-1BA15</li> <li>Size: S0</li> <li>Adjustable Current Range (A-release): 1.4 to 2.0A</li> <li>Short-Circuit Release (N-release): 26A</li> <li>Trip Class: CLASS 10</li> <li>Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)</li> <li>Terminal Type: Screw Terminals</li> <li>Operating Voltage: Up to 690V AC</li> </ul> <h3>Label Info</h3> <ul> <li>Type: 3RV2021-1BA15</li> <li>EAN: 4047621003221</li> <li>Date Code: G/190814</li> </ul> <h3>Application</h3> <p>Ideal for protecting three-phase motors in a wide range of industrial machinery, including conveyor systems, pumps, fans, and machine tools. Its compact size S0 design makes it suitable for installation in control cabinets with limited space.</p> <h3>Country of Origin</h3> <p>Made in Germany.</p> <h3>CO2 Impact</h3> <p>By purchasing this reused component, you are helping to prevent the emission of approximately 20 kg of CO2. This saving is comparable to driving a car for 100 kilometers.</p> <h3>Availability</h3> <p>This product is in stock and available for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <strong>What is the significance of “CLASS 10” on this circuit breaker?</strong><br><p>CLASS 10 indicates the trip class for overload protection. It means the circuit breaker will trip within 10 seconds when the motor is subjected to a locked-rotor current that is 7.2 times the set current value. This is suitable for standard motor starting applications.</p> <strong>Can this 3RV2021-1BA15 be used for single-phase motor protection?</strong><br><p>Yes, while designed for three-phase motors, it can be used for single-phase applications. To do so, you must wire all three poles in series to ensure the thermal overload mechanism functions correctly and provides accurate protection. Refer to the Siemens manual for the correct wiring diagram.</p> <strong>What is the function of the built-in 1NO+1NC auxiliary switch?</strong><br><p>The integrated auxiliary switch (1 Normally Open, 1 Normally Closed) is used for signaling purposes. The contacts change state when the circuit breaker trips or is manually switched. This can be used to send a signal to a PLC, illuminate an indicator lamp on a control panel, or interlock with other control circuit components.</p> <p><em>spareparts2day is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.</em></p> <p>Last Update: Friday, March 13, 2026</p>